So in an 85 300SD and 82 300D...where abouts do you think/guess that RPM point is past where you don't get any more charging power? Thanks, Chris
Werner Fehlauer <[EMAIL PROTECTED]> wrote: Chris - yes, the curve isn't linear. And the limitation is field magnetic strength, current capacity of the windings, connections, and controls, and mechanical rpm limits where things begin to fly apart. But generators and alternators both generate power from a coil of wire rotating through a magnetic field, or vice versa. DC generators have another point of limitation, the commutator and brushes, which can only handle a finite amount of current for their size before heat burns them up. Alternators get around that by rotating the magnetic field, energized through slip rings, which don't have to carry nearly as much current. Usually, the regulator limits the current to protect the rectifying diodes from self destruction from heat, and that should happen before the main coils and insulation begin to fry. So in practice, you are correct - at some point, the protective circuitry should limit the output current so that it doesn't "cook" itself to death. Remove the regulator, and it is theoretically possible to get more current with more rpms, at the risk of ruining the alternator or what's connected to it. Werner ----- Original Message ----- From: "Christopher McCann" To: Sent: Monday, February 05, 2007 3:34 PM Subject: [MBZ] RPM, alternator, battery charging > What is the relation of these three? Is it linear, non-linear? Is there a > point (RPMs) over which you don't gain any more charging? I THINK if it > were a generator, then the faster it goes, the more juice you get, but > it's an alternator and I just don't know how these factors interplay > > Thanks in advance! > > Chris > > > > > Christopher McCann, Squier Park, Kansas City, Missouri _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com --------------------------------- Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. From [EMAIL PROTECTED] Mon Feb 05 21:34:18 2007 Received: from wnpgmb02-group-smtpout.mts.net ([142.161.130.102] helo=mx-mtaout01.mts.net) by server8.arterytc8.net with esmtp (Exim 4.63) (envelope-from <[EMAIL PROTECTED]>) id 1HEBTe-0001eI-54 for mercedes@okiebenz.com; Mon, 05 Feb 2007 21:34:18 +0000 Received: from wnpgmb01-c600f.mts.net ([172.17.170.28]) by mx-mtaout01.mts.net with ESMTP id <[EMAIL PROTECTED]> for <mercedes@okiebenz.com>; Mon, 5 Feb 2007 15:33:32 -0600 Received: from wnpgmb09dc1-153-35.dynamic.mts.net (HELO one) ([204.112.153.35]) by wnpgmb01-c600f.mts.net with SMTP; 05 Feb 2007 15:33:32 -0600 X-BrightmailFiltered: true X-Brightmail-Tracker: AAAAAA== X-IronPort-AV: i="4.13,284,1167631200"; d="scan'208"; a="17921758:sNHT26368615" From: "R A Bennell" <[EMAIL PROTECTED]> To: "Mercedes Discussion List" <mercedes@okiebenz.com> Date: Mon, 5 Feb 2007 15:37:18 -0600 Message-ID: <[EMAIL PROTECTED]> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 Importance: Normal X-Antivirus-Scanner: Clean mail though you should still use an Antivirus Subject: [MBZ] COLD! X-BeenThere: mercedes@okiebenz.com X-Mailman-Version: 2.1.9.cp2 Precedence: list Reply-To: Mercedes Discussion List <mercedes@okiebenz.com> List-Id: Mercedes Discussion List <mercedes_okiebenz.com.okiebenz.com> List-Unsubscribe: <http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com>, <mailto:[EMAIL PROTECTED]> List-Archive: <http://okiebenz.com/pipermail/mercedes_okiebenz.com> List-Post: <mailto:mercedes@okiebenz.com> List-Help: <mailto:[EMAIL PROTECTED]> List-Subscribe: <http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com>, <mailto:[EMAIL PROTECTED]> X-List-Received-Date: Mon, 05 Feb 2007 21:34:18 -0000 I am glad I don't try to run my old diesel here in the winter. It was minus 39 here last night and the high yesterday was minus 27. We have been in the deep freeze for days and it appears there is no immediate end in sight. Gas powered cars with fuel injection seem willing to start no matter what even without being plugged in. One of our F150's needed the block heater cord end replaced yesterday. My younger son Thomas commented that it had been cranking slow the last few days. I checked and it was not working at all. Cut the cord end off and put a new one on. Works now. Cord didn't look too good however so will replace the whole thing once the weather warms up - IE - I hope I remember to do it before next winter because of course, once it warms up, we won't need it and often then forget to do it until it is once again real cold out. Randy in Winnipeg
